[FEATURE] add /improve-prompt

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

When working in Claude Code, users often start with a rough prompt and then iterate multiple times in case Claude misunderstands intent. I propose a fast, in-terminal way to rewrite draft into a clearer, more accurate prompt (like the Prompt Improver on the Claude platform docs) without leaving workflow or manually iterate on prompt.

Proposed Solution

Add a built-in slash command: /improve-prompt that takes current draft prompt (optionally plus repository context/selected files) and returns an improved version in the input box, ideally with:
an “apply / cancel” interaction

Alternative Solutions

_No response_

Priority

Low - Nice to have

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_